Fix pg_dump's failure to dump REPLICA IDENTITY for constraint indexes.

pg_dump knew about printing ALTER TABLE ... REPLICA IDENTITY USING INDEX
for indexes declared as indexes, but it failed to print that for indexes
declared as unique or primary-key constraints.  Per report from Achilleas
Mantzios.

This has been broken since the feature was introduced, AFAICS.
Back-patch to 9.4.

Discussion: https://postgr.es/m/1e6cc5ad-b84a-7c07-8c08-a4d0c3cdc938@matrix.gatewaynet.com

diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index cb3e6b2a8f83e0765f4ed304f01718a95af3804d..503279733ca11c0e95559178b3fa6729ce8c7d01 100644 (file)
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -15633,6 +15633,12 @@ dumpIndex(Archive *fout, IndxInfo *indxinfo)
                /* Plain secondary index */
                appendPQExpBuffer(q, "%s;\n", indxinfo->indexdef);
 
+               /*
+                * Append ALTER TABLE commands as needed to set properties that we
+                * only have ALTER TABLE syntax for.  Keep this in sync with the
+                * similar code in dumpConstraint!
+                */
+
                /* If the index is clustered, we need to record that. */
                if (indxinfo->indisclustered)
                {
@@ -15833,6 +15839,12 @@ dumpConstraint(Archive *fout, ConstraintInfo *coninfo)
                        appendPQExpBufferStr(q, ";\n");
                }
 
+               /*
+                * Append ALTER TABLE commands as needed to set properties that we
+                * only have ALTER TABLE syntax for.  Keep this in sync with the
+                * similar code in dumpIndex!
+                */
+
                /* If the index is clustered, we need to record that. */
                if (indxinfo->indisclustered)
                {
@@ -15843,6 +15855,16 @@ dumpConstraint(Archive *fout, ConstraintInfo *coninfo)
                                                          fmtId(indxinfo->dobj.name));
                }
 
+               /* If the index defines identity, we need to record that. */
+               if (indxinfo->indisreplident)
+               {
+                       appendPQExpBuffer(q, "\nALTER TABLE ONLY %s REPLICA IDENTITY USING",
+                                                         fmtQualifiedDumpable(tbinfo));
+                       /* index name is not qualified in this syntax */
+                       appendPQExpBuffer(q, " INDEX %s;\n",
+                                                         fmtId(indxinfo->dobj.name));
+               }
+
                appendPQExpBuffer(delq, "ALTER TABLE ONLY %s ",
                                                  fmtQualifiedDumpable(tbinfo));
                appendPQExpBuffer(delq, "DROP CONSTRAINT %s;\n",